B. Problem Solving: In a departmental examination on Statistics taken by 105 students, the mean grade was 64 and the standard deviation was 10. If the grades are approximately nomally distributed a. What is the probability that a randomly selected student would get a Score below 702 b. About how many students got grades above 60? c. What percentage of students got scores between 60 and 70?

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A: From the obtained results, the mean is 9.02 and the standard deviation is 5.7910.

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A:

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A: GIVEN DATA normal distributionμ = 72σ = 4